var text = '<ul>' +
        '<li><button onclick="getTime()">Timeline</button></li>' +
        '<li class="active"><a href="#">Sunburst</a></li>' +
        '<li><a href="#">Pie Transition</a></li>' +
        '<li><a href="./pie.html">Pie</a></li>'+
    '</ul>';
    
    
document.getElementById("nav").innerHTML = text;
